On Fri, 5 Sep 2003, David Kesselring wrote: > I'm trying to build u-boot bootloader for a 5kc core in 64 bit mode. I'm > having problems with the compiler/linker. If anyone has any ideas, please > let me know. > > When I use the toolchain that installs in > "/usr/cygnus/mips3264-020217/H-i686-pc-linux-gnulibc2.1/bin", I get a link > problem where all opcodes are not aligned on a 64 bit boundry. I get an > extra 32bit word of 0x0 between two 64bit opcodes in the binary file. > The cpp options I use are:-mips64 -EL -mlong64 -mcpu=r5k I don't really understand -- MIPS regular opcodes (i.e. not in the MIPS16 mode) have to be aligned to 32-bit boundaries. What do you mean by "64-bit opcodes"? If there is a null word (a "nop") between each pair of emitted opcodes, then the resulting binary should still work, although suboptimally. It may be a bug in gcc or gas. Does the output from gcc contains the padding? What are the versions of gcc and binutils? > When I use a toolchain which I think I ftp'd from linux-mips.org > (mips64el-linux), I get the following error. The cpp options I use > are:-EL -mabi=64 -mips4 -mlong64 > > > /usr/bin/mips64el-linux-gcc -O -D__KERNEL__ -DTEXT_BASE=0x00000 > -I/home/dkesselr/uboot/u-boot-0.4.5-atmel/include > -I/home/dkesselr/uboot/u-boot-0.4.5-atmel/include/asm -fno-builtin > -ffreestanding -nostdinc -isystem > /usr/lib/gcc-lib/mips64el-linux/2.95.4/include -pipe -DCONFIG_MIPS > -D__MIPS__ -EL -mabi=64 -mips4 > -mlong64 -Wall -Wstrict-prototypes -c -o atmel352.o atmel352.c > atmel352.c: In function `sdram_timing_init': > atmel352.c:82: warning: cast to pointer from integer of different size > atmel352.c:90: warning: cast to pointer from integer of different size > atmel352.c: In function `copydwords': > atmel352.c:186: Internal compiler error in `rtx_equal_for_memref_p', at > alias.c:682 > Please submit a full bug report. > See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions. > cpp0: output pipe has been closed That's interesting -- it's almost surely a bug in the RTL. I may try to reproduce it with my toolchain -- can you send me a preprocessed version of this file? If so, please run the following command and send me the resulting atmel352.i file -- use `bzip2 -9' or `gzip -9' and send it attached directly to me only to save net resources: $ /usr/bin/mips64el-linux-gcc -O -D__KERNEL__ -DTEXT_BASE=0x00000 -I/home/dkesselr/uboot/u-boot-0.4.5-atmel/include -I/home/dkesselr/uboot/u-boot-0.4.5-atmel/include/asm -fno-builtin -ffreestanding -nostdinc -isystem /usr/lib/gcc-lib/mips64el-linux/2.95.4/include -pipe -DCONFIG_MIPS -D__MIPS__ -EL -mabi=64 -mips4 -mlong64 -Wall -Wstrict-prototypes -E -o atmel352.i atmel352.c Maciej -- + Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: macro@ds2.pg.gda.pl, PGP key available +
